We architect and deploy custom Solidity/Rust smart contracts that form the backbone of your protocol. Our development process is built on OpenZeppelin standards and formal verification principles to ensure security and reliability from day one.
LABS
Services
Compliant NFT Cross-Marketplace Trading System
A secure, white-label trading engine with integrated regulatory compliance modules, enabling legal NFT aggregation across platforms in global markets.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built to your exact specifications.
Deliver a battle-tested, gas-optimized contract suite in as little as 2-4 weeks.
- Custom Logic: Tailored
ERC-20,ERC-721, staking, governance, and DeFi primitives. - Security-First: Multi-stage audits, including automated analysis and manual review.
- Full Lifecycle: From architecture and development to deployment, verification, and monitoring on mainnet.
key-features-cards
ENTERPRISE-GRADE INFRASTRUCTURE
Core Compliance & Trading Capabilities
Our system integrates regulatory compliance directly into the trading layer, enabling secure, high-volume NFT transactions across marketplaces without sacrificing performance or user experience.
01
Real-Time AML/KYC Screening
Automated screening of wallet addresses and transaction patterns against global sanctions lists and risk databases. Prevents prohibited transactions before they are broadcast to the network, ensuring regulatory adherence.
< 100ms
Screening Latency
Global
Watchlist Coverage
02
Cross-Marketplace Order Book
Unified liquidity pool aggregating listings from major NFT marketplaces (OpenSea, Blur, LooksRare). Enables best-price execution and reduces slippage for large-volume institutional trades.
Sub-second
Price Sync
Multi-chain
Liquidity Access
03
Programmable Compliance Rules Engine
Define and enforce custom trading policies (e.g., jurisdiction whitelists, transaction limits, asset class restrictions) via a no-code dashboard or API. Rules are executed on-chain for tamper-proof audit trails.
Granular
Policy Controls
On-chain
Rule Enforcement
04
Secure Custody & Settlement
MPC (Multi-Party Computation) wallet infrastructure for secure asset custody. Supports instant, atomic swaps with guaranteed finality, eliminating counterparty risk in cross-marketplace trades.
SOC 2 Type II
Certified
Atomic
Settlement
05
Comprehensive Audit Logging
Immutable, granular logs of all compliance checks, user actions, and transaction states. Data is formatted for easy export to regulatory bodies and internal compliance teams.
Immutable
Record Keeping
FATF Travel Rule
Ready
06
Gas-Optimized Smart Contract Suite
Custom-built, audited smart contracts for trading, escrow, and royalty enforcement. Built with Solidity 0.8+ and OpenZeppelin libraries, optimized for cost efficiency at scale.
Audited
Security
Up to 40%
Gas Savings
benefits
DELIVERABLES & GUARANTEES
Business Outcomes for Your Platform
Our compliant NFT cross-marketplace trading system delivers measurable results, from accelerated revenue to ironclad security. Here’s what you can expect.
01
Accelerated Time-to-Market
Deploy a fully functional, compliant cross-trading system in under 4 weeks. Our modular architecture and battle-tested smart contract libraries eliminate months of development time.
< 4 weeks
Deployment Time
Pre-audited
Core Contracts
02
Regulatory & Compliance Shield
Built-in compliance engine for KYC/AML, transaction monitoring, and jurisdictional controls. Integrates with leading providers like Chainalysis and Elliptic for enterprise-grade risk management.
Real-time
Sanctions Screening
Jurisdiction-Aware
Rule Engine
03
Seamless Multi-Marketplace Liquidity
Aggregate liquidity and enable direct NFT trades across major marketplaces (OpenSea, Blur, LooksRare) without bridging or wrapping, increasing user reach and platform volume.
Zero-Wrap
Asset Transfer
Unified Orderbook
Liquidity Pool
04
Enterprise-Grade Security & Audits
All core smart contracts undergo formal verification and audits by leading firms. We provide a 99.9% uptime SLA for the relay infrastructure and secure multi-sig treasury management.
99.9%
Infrastructure SLA
Formally Verified
Core Logic
05
Scalable Revenue Model
Capture fees on cross-marketplace trades with a flexible fee structure. Our system supports tiered fees, creator royalties enforcement, and detailed analytics for revenue optimization.
Configurable
Fee Tiers
Royalty-Compliant
Payouts
06
Reduced Operational Overhead
We manage the complex infrastructure—indexers, relayers, compliance nodes—so your team can focus on core product growth. Includes 24/7 monitoring and incident response.
Fully Managed
Infrastructure
24/7 SRE
Support
Structured Roadmap to Production
Phased Development & Deployment
A transparent, milestone-driven approach to building your compliant NFT cross-marketplace trading system, from initial MVP to full-scale enterprise deployment.
| Phase & Deliverables | Foundation | Growth | Enterprise Scale |
|---|---|---|---|
Core Smart Contract Suite (ERC-721, ERC-1155) | |||
Multi-Marketplace Aggregator Layer | |||
Compliance Engine (KYC/AML, Royalty Enforcement) | Basic Rules | Dynamic Rules | Custom Jurisdictional Logic |
Cross-Chain Bridge Integration (EVM) | Polygon <> Ethereum |
|
|
Real-Time Order Book & Price Discovery | |||
Advanced Analytics Dashboard | Basic Metrics | Custom BI Integration | |
Security Audit & Penetration Testing | Automated Scan | Manual Review by Partner | Full Audit + Bug Bounty Program |
Deployment & DevOps Support | Self-Service Guides | Managed Deployment | Dedicated SRE Team |
Ongoing Support & SLA | Community Support | Business Hours (9-5) | 24/7 with 1hr Response |
Estimated Timeline | 6-8 Weeks | 3-4 Months | Custom Roadmap |
Typical Investment | $50K - $100K | $150K - $300K | $500K+ |
how-we-deliver
CORE SERVICE
Smart Contract Development
Secure, gas-optimized smart contracts built for production and audited for enterprise-grade reliability.
We architect and deploy custom Solidity/Rust contracts that are secure by design. Every line of code follows OpenZeppelin standards and undergoes rigorous internal review before deployment to EVM or Solana mainnets.
- Full Lifecycle Support: From initial concept and technical specification to deployment, verification, and post-launch monitoring.
- Gas Optimization: We reduce transaction costs by up to 40% through efficient storage patterns and contract architecture.
- Security-First: Multi-stage audits, including automated analysis (
Slither,MythX) and manual review, to mitigate risks before mainnet launch.
Deliver a market-ready, audited contract suite in as little as 3 weeks, accelerating your time-to-market while ensuring fund safety and protocol integrity.
The Infrastructure Decision for NFT Marketplaces
Build vs. Buy vs. Non-Compliant Build
A technical and financial comparison of approaches to implementing a compliant cross-marketplace trading system, highlighting the risks and total cost of ownership.
| Key Factor | Build In-House | Buy from Chainscore | Non-Compliant Build |
|---|---|---|---|
Time to Market | 6-12 months | 4-8 weeks | 3-6 months |
Initial Development Cost | $150K - $400K+ | $80K - $200K | $80K - $200K |
Regulatory & Compliance Logic | Your team's research | Pre-built, battle-tested modules | None / Ad-hoc |
Smart Contract Security | High risk (unaudited) | Low risk (audited by top firms) | Critical risk (unaudited) |
Royalty Enforcement | Custom implementation | Standardized, chain-agnostic solution | Bypassed or ignored |
Cross-Chain Settlement | Complex custom integration | Native support for 5+ major L2s | Single-chain only |
Ongoing Maintenance & Updates | Full internal team burden | Optional SLA with 24/7 monitoring | Reactive, high-security debt |
Legal & Regulatory Liability | Your company assumes all risk | Shared risk with proven provider | Extreme exposure to lawsuits |
Total Cost of Ownership (Year 1) | $300K - $700K+ | $100K - $250K | $150K - $400K+ |
Recommended For | Teams with 5+ full-time blockchain engineers | FinTechs, VCs, and startups scaling securely | Not recommended |
Compliant NFT Trading
Frequently Asked Questions
Get clear answers on how our cross-marketplace trading system works, from deployment to compliance and ongoing support.
It's a unified smart contract and backend infrastructure that allows users to list and trade NFTs across multiple marketplaces (like OpenSea, Blur, LooksRare) from a single wallet, while enforcing creator royalties, KYC/AML checks, and jurisdictional restrictions. We build the protocol layer that connects marketplaces, wallets, and compliance providers into one seamless experience.
ENQUIRY
Get In Touch
today.
Our experts will offer a free quote and a 30min call to discuss your project.
NDA Protected
Confidentiality24h Response
Time to ValueDirectly to Engineering Team
No Sales Fluff10+
Protocols Shipped
$20M+
TVL Overall